<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <title>尺寸限制和内边距</title>
  <style>
    body {
      padding: 100px;
    }

    article {
      border: solid 1px #ddd;
      height: 300px;
      width: 300px;
      padding:145px;
      box-sizing: border-box;

    }

    div {
      /* 130 130*/
      padding: 30px 50px 100px 80px
    }
  </style>
</head>

<body>

  <article>
    <!-- <a href="">MYSQL</a> -->
    <!-- <a href="">CSS</a> -->
    <div>houdunren.com</div>
  </article>
</body>

</html>